A model for showing available data sources and other items in a structured tree. More...

#include <qgsbrowsermodel.h>

Inheritance diagram for QgsBrowserModel:

Public Types
enum	ItemDataRole { PathRole = Qt::UserRole , CommentRole = Qt::UserRole + 1 , SortRole , ProviderKeyRole , LayerMetadataRole }

Public Slots
void	addFavoriteDirectory (const QString &directory, const QString &name=QString())
	Adds a directory to the favorites group.

void	beginInsertItems (QgsDataItem *parent, int first, int last)

void	beginRemoveItems (QgsDataItem *parent, int first, int last)

void	endInsertItems ()

void	endRemoveItems ()

void	hidePath (QgsDataItem *item)
	Hide the given path in the browser model.

void	initialize ()
	Delayed initialization, needed because the provider registry must be already populated.

void	itemDataChanged (QgsDataItem *item)

void	itemStateChanged (QgsDataItem *item, Qgis::BrowserItemState oldState)
	Emitted when an item's state is changed.

void	refreshDrives ()
	Refreshes the list of drive items, removing any corresponding to removed drives and adding newly added drives.

void	reload ()
	Reload the whole model.

void	removeFavorite (const QModelIndex &index)
	Removes a favorite directory from its corresponding model index.

void	removeFavorite (QgsFavoriteItem *favorite)
	Removes a favorite item.

void	updateProjectHome ()

Signals
void	connectionsChanged (const QString &providerKey)
	Emitted when connections for the specified providerKey have changed in the browser.

void	stateChanged (const QModelIndex &index, Qgis::BrowserItemState oldState)
	Emitted when item children fetch was finished.

Public Member Functions
	QgsBrowserModel (QObject *parent=nullptr)
	Constructor for QgsBrowserModel, with the specified parent object.

	~QgsBrowserModel () override

bool	canFetchMore (const QModelIndex &parent) const override

int	columnCount (const QModelIndex &parent=QModelIndex()) const override

Q_DECL_DEPRECATED void	connectItem (QgsDataItem *item)

QVariant	data (const QModelIndex &index, int role=Qt::DisplayRole) const override

QgsDataItem *	dataItem (const QModelIndex &idx) const
	Returns the data item at the specified index, or `nullptr` if no item exists at the index.

QMap< QString, QgsDirectoryItem * >	driveItems () const
	Returns a map of the root drive items shown in the browser.

bool	dropMimeData (const QMimeData *data, Qt::DropAction action, int row, int column, const QModelIndex &parent) override

void	fetchMore (const QModelIndex &parent) override

QModelIndex	findItem (QgsDataItem item, QgsDataItem parent=nullptr) const
	Returns the model index corresponding to the specified data item.

QModelIndex	findPath (const QString &path, Qt::MatchFlag matchFlag=Qt::MatchExactly)
	Returns index of item with given path.

QModelIndex	findUri (const QString &uri, QModelIndex index=QModelIndex())
	Returns index of layer item with given uri.

Qt::ItemFlags	flags (const QModelIndex &index) const override

bool	hasChildren (const QModelIndex &parent=QModelIndex()) const override

QVariant	headerData (int section, Qt::Orientation orientation, int role=Qt::DisplayRole) const override

QModelIndex	index (int row, int column, const QModelIndex &parent=QModelIndex()) const override

bool	initialized () const
	Returns `true` if the model has been initialized.

QMimeData *	mimeData (const QModelIndexList &indexes) const override

QStringList	mimeTypes () const override

QModelIndex	parent (const QModelIndex &index) const override

void	refresh (const QModelIndex &index=QModelIndex())
	Refresh item children.

void	refresh (const QString &path)
	Refresh item specified by path.

QVector< QgsDataItem * >	rootItems () const
	Returns the root items for the model.

int	rowCount (const QModelIndex &parent=QModelIndex()) const override

bool	setData (const QModelIndex &index, const QVariant &value, int role=Qt::EditRole) override

Static Public Member Functions
static QModelIndex	findPath (QAbstractItemModel *model, const QString &path, Qt::MatchFlag matchFlag=Qt::MatchExactly)

Protected Member Functions
void	addRootItems ()
	Populates the model.

void	removeRootItems ()

Protected Attributes
QgsFavoritesItem *	mFavorites = nullptr

QgsDirectoryItem *	mProjectHome = nullptr

QVector< QgsDataItem * >	mRootItems

Friends
class	TestQgsBrowserModel

class	TestQgsBrowserProxyModel

Detailed Description

A model for showing available data sources and other items in a structured tree.

QgsBrowserModel is the foundation for the QGIS browser panel, and includes items for the different data providers and folders accessible to users.

QgsBrowserModel models are not initially populated and use a deferred initialization approach. After constructing a QgsBrowserModel, a call must be made to initialize() in order to populate the model.

Note: Since QGIS 3.10 it is recommended to use QgsBrowserGuiModel from GUI library. Implementation of data items used from QgsBrowserModel should not trigger any GUI operations such as opening of widgets/dialogs or showing message boxes. Such actions should be implemented in a new QgsDataItemGuiProvider subclass which is used by QgsBrowserGuiModel (but not by QgsBrowserModel).

Definition at line 52 of file qgsbrowsermodel.h.

Member Enumeration Documentation

◆ ItemDataRole

enum QgsBrowserModel::ItemDataRole

Enumerator
PathRole	Item path used to access path in the tree, see QgsDataItem::mPath.
CommentRole	Item comment.
SortRole	Custom sort role, see QgsDataItem::sortKey()
ProviderKeyRole	Data item provider key that created the item, see QgsDataItem::providerKey() Since QGIS 3.12
LayerMetadataRole

Definition at line 69 of file qgsbrowsermodel.h.

Constructor & Destructor Documentation

◆ QgsBrowserModel()

QgsBrowserModel::QgsBrowserModel ( QObject * parent = nullptr )

explicit

Constructor for QgsBrowserModel, with the specified parent object.

Note: QgsBrowserModel models are not initially populated and use a deferred initialization approach. After constructing a QgsBrowserModel, a call must be made to initialize() in order to populate the model.

Definition at line 72 of file qgsbrowsermodel.cpp.

◆ ~QgsBrowserModel()

QgsBrowserModel::~QgsBrowserModel ( )

override

Definition at line 82 of file qgsbrowsermodel.cpp.

Member Function Documentation

◆ addFavoriteDirectory

void QgsBrowserModel::addFavoriteDirectory	(	const QString &	directory,
		const QString &	name = `QString()`
	)

slot

Adds a directory to the favorites group.

If name is specified, it will be used as the favorite's name. Otherwise the name will be set to match directory.

See also: removeFavorite()

Since: QGIS 3.0

Definition at line 752 of file qgsbrowsermodel.cpp.

◆ addRootItems()

void QgsBrowserModel::addRootItems ( )

protected

Populates the model.

Definition at line 114 of file qgsbrowsermodel.cpp.

◆ beginInsertItems

void QgsBrowserModel::beginInsertItems	(	QgsDataItem *	parent,
		int	first,
		int	last
	)

slot

Definition at line 591 of file qgsbrowsermodel.cpp.

◆ beginRemoveItems

void QgsBrowserModel::beginRemoveItems	(	QgsDataItem *	parent,
		int	first,
		int	last
	)

slot

Definition at line 606 of file qgsbrowsermodel.cpp.

◆ canFetchMore()

bool QgsBrowserModel::canFetchMore ( const QModelIndex & parent ) const

override

Definition at line 713 of file qgsbrowsermodel.cpp.

◆ columnCount()

int QgsBrowserModel::columnCount ( const QModelIndex & parent = QModelIndex() ) const

override

Definition at line 415 of file qgsbrowsermodel.cpp.

◆ connectionsChanged

void QgsBrowserModel::connectionsChanged ( const QString & providerKey )

signal

Emitted when connections for the specified providerKey have changed in the browser.

Forwarded to the widget and used to notify the provider dialogs of a changed connection.

◆ connectItem()

void QgsBrowserModel::connectItem ( QgsDataItem * item )

Deprecated:: Deprecated since QGIS 3.4 – this method has no effect, and is dangerous to call in earlier QGIS versions. Any usage should be removed (and will have no harmful side-effects!).

Definition at line 490 of file qgsbrowsermodel.cpp.

◆ data()

QVariant QgsBrowserModel::data	(	const QModelIndex &	index,
		int	role = `Qt::DisplayRole`
	)		const

override

Definition at line 290 of file qgsbrowsermodel.cpp.

◆ dataItem()

QgsDataItem * QgsBrowserModel::dataItem ( const QModelIndex & idx ) const

Returns the data item at the specified index, or nullptr if no item exists at the index.

Definition at line 705 of file qgsbrowsermodel.cpp.

◆ driveItems()

QMap< QString, QgsDirectoryItem * > QgsBrowserModel::driveItems ( ) const

Returns a map of the root drive items shown in the browser.

These correspond to the top-level directory items shown, e.g. on Windows the C:\, D:\, etc, and on Linux the "/" root directory.

Since: QGIS 3.6

Definition at line 244 of file qgsbrowsermodel.cpp.

◆ dropMimeData()

bool QgsBrowserModel::dropMimeData	(	const QMimeData *	data,
		Qt::DropAction	action,
		int	row,
		int	column,
		const QModelIndex &	parent
	)

override

Definition at line 691 of file qgsbrowsermodel.cpp.

◆ endInsertItems

void QgsBrowserModel::endInsertItems ( )

slot

Definition at line 601 of file qgsbrowsermodel.cpp.

◆ endRemoveItems

void QgsBrowserModel::endRemoveItems ( )

slot

Definition at line 614 of file qgsbrowsermodel.cpp.

◆ fetchMore()

void QgsBrowserModel::fetchMore ( const QModelIndex & parent )

override

Definition at line 721 of file qgsbrowsermodel.cpp.

◆ findItem()

QModelIndex QgsBrowserModel::findItem	(	QgsDataItem *	item,
		QgsDataItem *	parent = `nullptr`
	)		const

Returns the model index corresponding to the specified data item.

If the item was not found, an invalid QModelIndex is returned.

If the parent item is argument is specified, then only items which are children of parent are searched. If no parent is specified, then all items within the model are searched.

Definition at line 575 of file qgsbrowsermodel.cpp.

◆ findPath() [1/2]

QModelIndex QgsBrowserModel::findPath	(	const QString &	path,
		Qt::MatchFlag	matchFlag = `Qt::MatchExactly`
	)

Returns index of item with given path.

It only searches in currently fetched items, i.e. it does not fetch children.

Parameters

path	item path
matchFlag	supported is Qt::MatchExactly and Qt::MatchStartsWith which has reverse meaning, i.e. find item with the longest match from start with path (to get as close/deep as possible to deleted item).

Returns: model index, invalid if item not found

Definition at line 421 of file qgsbrowsermodel.cpp.

◆ findPath() [2/2]

QModelIndex QgsBrowserModel::findPath	(	QAbstractItemModel *	model,
		const QString &	path,
		Qt::MatchFlag	matchFlag = `Qt::MatchExactly`
	)

static

Note: not available in Python bindings

Definition at line 426 of file qgsbrowsermodel.cpp.

◆ findUri()

QModelIndex QgsBrowserModel::findUri	(	const QString &	uri,
		QModelIndex	index = `QModelIndex()`
	)

Returns index of layer item with given uri.

It only searches in currently fetched items, i.e. it does not fetch children.

Parameters

uri	item uri
index	the current index of the parent (to search for children)

Returns: model index, invalid if item not found

Since: QGIS 3.6

Definition at line 466 of file qgsbrowsermodel.cpp.

◆ flags()

Qt::ItemFlags QgsBrowserModel::flags ( const QModelIndex & index ) const

override

Definition at line 260 of file qgsbrowsermodel.cpp.

◆ hasChildren()

bool QgsBrowserModel::hasChildren ( const QModelIndex & parent = QModelIndex() ) const

override

Definition at line 406 of file qgsbrowsermodel.cpp.

◆ headerData()

QVariant QgsBrowserModel::headerData	(	int	section,
		Qt::Orientation	orientation,
		int	role = `Qt::DisplayRole`
	)		const

override

Definition at line 377 of file qgsbrowsermodel.cpp.

◆ hidePath

void QgsBrowserModel::hidePath ( QgsDataItem * item )

slot

Hide the given path in the browser model.

Definition at line 775 of file qgsbrowsermodel.cpp.

◆ index()

QModelIndex QgsBrowserModel::index	(	int	row,
		int	column,
		const QModelIndex &	parent = `QModelIndex()`
	)		const

override

Definition at line 555 of file qgsbrowsermodel.cpp.

◆ initialize

void QgsBrowserModel::initialize ( )

slot

Delayed initialization, needed because the provider registry must be already populated.

See also: initialized()

Definition at line 250 of file qgsbrowsermodel.cpp.

◆ initialized()

bool QgsBrowserModel::initialized ( ) const

inline

Returns true if the model has been initialized.

See also: initialize()

Definition at line 150 of file qgsbrowsermodel.h.

◆ itemDataChanged

void QgsBrowserModel::itemDataChanged ( QgsDataItem * item )

slot

Definition at line 619 of file qgsbrowsermodel.cpp.

◆ itemStateChanged

void QgsBrowserModel::itemStateChanged	(	QgsDataItem *	item,
		Qgis::BrowserItemState	oldState
	)

slot

Emitted when an item's state is changed.

Definition at line 627 of file qgsbrowsermodel.cpp.

◆ mimeData()

QMimeData * QgsBrowserModel::mimeData ( const QModelIndexList & indexes ) const

override

Definition at line 668 of file qgsbrowsermodel.cpp.

◆ mimeTypes()

QStringList QgsBrowserModel::mimeTypes ( ) const

override

Definition at line 659 of file qgsbrowsermodel.cpp.

◆ parent()

QModelIndex QgsBrowserModel::parent ( const QModelIndex & index ) const

override

Definition at line 566 of file qgsbrowsermodel.cpp.

◆ refresh() [1/2]

void QgsBrowserModel::refresh ( const QModelIndex & index = QModelIndex() )

Refresh item children.

Definition at line 741 of file qgsbrowsermodel.cpp.

◆ refresh() [2/2]

void QgsBrowserModel::refresh ( const QString & path )

Refresh item specified by path.

Definition at line 734 of file qgsbrowsermodel.cpp.

◆ refreshDrives

void QgsBrowserModel::refreshDrives ( )

slot

Refreshes the list of drive items, removing any corresponding to removed drives and adding newly added drives.

Since: QGIS 3.4

Definition at line 504 of file qgsbrowsermodel.cpp.

◆ reload

void QgsBrowserModel::reload ( )

slot

Reload the whole model.

Definition at line 495 of file qgsbrowsermodel.cpp.

◆ removeFavorite [1/2]

void QgsBrowserModel::removeFavorite ( const QModelIndex & index )

slot

Removes a favorite directory from its corresponding model index.

See also: addFavoriteDirectory()

Since: QGIS 3.0

Definition at line 758 of file qgsbrowsermodel.cpp.

◆ removeFavorite [2/2]

void QgsBrowserModel::removeFavorite ( QgsFavoriteItem * favorite )

slot

Removes a favorite item.

See also: addFavoriteDirectory()

Note: Not available in Python bindings

Since: QGIS 3.6

Definition at line 767 of file qgsbrowsermodel.cpp.

◆ removeRootItems()

void QgsBrowserModel::removeRootItems ( )

protected

Definition at line 191 of file qgsbrowsermodel.cpp.

◆ rootItems()

QVector< QgsDataItem * > QgsBrowserModel::rootItems ( ) const

inline

Returns the root items for the model.

Since: QGIS 3.28

Definition at line 167 of file qgsbrowsermodel.h.

◆ rowCount()

int QgsBrowserModel::rowCount ( const QModelIndex & parent = QModelIndex() ) const

override

Definition at line 388 of file qgsbrowsermodel.cpp.

◆ setData()

bool QgsBrowserModel::setData	(	const QModelIndex &	index,
		const QVariant &	value,
		int	role = `Qt::EditRole`
	)

override

Definition at line 349 of file qgsbrowsermodel.cpp.

◆ stateChanged

void QgsBrowserModel::stateChanged	(	const QModelIndex &	index,
		Qgis::BrowserItemState	oldState
	)

signal

Emitted when item children fetch was finished.

◆ updateProjectHome

void QgsBrowserModel::updateProjectHome ( )

slot

Definition at line 87 of file qgsbrowsermodel.cpp.

Friends And Related Symbol Documentation

◆ TestQgsBrowserModel

friend class TestQgsBrowserModel

friend

Definition at line 265 of file qgsbrowsermodel.h.

◆ TestQgsBrowserProxyModel

friend class TestQgsBrowserProxyModel

friend

Definition at line 266 of file qgsbrowsermodel.h.

Member Data Documentation

◆ mFavorites

QgsFavoritesItem* QgsBrowserModel::mFavorites = nullptr

protected

Definition at line 247 of file qgsbrowsermodel.h.

◆ mProjectHome

QgsDirectoryItem* QgsBrowserModel::mProjectHome = nullptr

protected

Definition at line 248 of file qgsbrowsermodel.h.

◆ mRootItems

QVector<QgsDataItem *> QgsBrowserModel::mRootItems

protected

Definition at line 246 of file qgsbrowsermodel.h.

The documentation for this class was generated from the following files:

/build/qgis-3.34.0+99sid/src/core/browser/qgsbrowsermodel.h
/build/qgis-3.34.0+99sid/src/core/browser/qgsbrowsermodel.cpp

Public Types

Public Slots

Signals

Public Member Functions

Static Public Member Functions

Protected Member Functions

Protected Attributes

Friends

Detailed Description

Member Enumeration Documentation

◆ ItemDataRole

Constructor & Destructor Documentation

◆ QgsBrowserModel()

◆ ~QgsBrowserModel()

Member Function Documentation

◆ addFavoriteDirectory

◆ addRootItems()

◆ beginInsertItems

◆ beginRemoveItems

◆ canFetchMore()

◆ columnCount()

◆ connectionsChanged

◆ connectItem()

◆ data()

◆ dataItem()

◆ driveItems()

◆ dropMimeData()

◆ endInsertItems

◆ endRemoveItems

◆ fetchMore()

◆ findItem()

◆ findPath() [1/2]

◆ findPath() [2/2]

◆ findUri()

◆ flags()

◆ hasChildren()

◆ headerData()

◆ hidePath

◆ index()

◆ initialize

◆ initialized()

◆ itemDataChanged

◆ itemStateChanged

◆ mimeData()

◆ mimeTypes()

◆ parent()

◆ refresh() [1/2]

◆ refresh() [2/2]

◆ refreshDrives

◆ reload

◆ removeFavorite [1/2]

◆ removeFavorite [2/2]

◆ removeRootItems()

◆ rootItems()

◆ rowCount()

◆ setData()

◆ stateChanged

◆ updateProjectHome

Friends And Related Symbol Documentation

◆ TestQgsBrowserModel

◆ TestQgsBrowserProxyModel

Member Data Documentation

◆ mFavorites

◆ mProjectHome

◆ mRootItems